4. Democratic Republic of Congo

The Democratic Republic of the Congo has been mired in conflict since 1998, the start of "Africa's World War." Though hostilities officially ended in 2003, sporadic attacks continue and 5.4 million people have died in the conflict. Despite recent improvements in the DRC's overall security situation, militia-related violence continues to plague the country. Disputes between the government and opposition forces often leads to unrest in cities such as Kinshasa, Matadi and Mbandaka.